TY - JOUR
T1 - The effects of AGN feedback on present-day galaxy properties in cosmological simulations
AU - Taylor, Philip
AU - Kobayashi, Chiaki
N1 - This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record [Philip Taylor, and Chiaki Kobayashi, 'The effects of AGN feedback on present-day galaxy properties in cosmological simulations', MNRAS, Vol. 448 (2): 1835-1846, April 2015] is available online at: https://doi.org/10.1093/mnras/stv139.
PY - 2015/4/1
Y1 - 2015/4/1
N2 - We show that feedback from active galactic nuclei (AGN) plays an essential role in reproducing the down-sizing phenomena, namely: the colour–magnitude relation; specific star formation rates; and the α enhancement of early-type galaxies. In our AGN model, black holes originate from Population III stars, in contrast to the merging scenario of previous works. In this paper, we show how the properties of present-day galaxies in cosmological chemo-hydrodynamical simulations change when we include our model for AGN feedback. Massive galaxies become redder, older, less massive, less compact, and show greater α enhancement than their counterparts without AGN. Since we reproduce the black hole mass and galaxy mass relation, smaller galaxies do not host a supermassive black hole and their star formation history is affected very little, but they can get external enrichment from nearby AGN depending on their environment. Nonetheless, the metallicity change is negligible, and the mass–metallicity relations, which are mainly generated by supernova feedback at the first starburst, are preserved.
AB - We show that feedback from active galactic nuclei (AGN) plays an essential role in reproducing the down-sizing phenomena, namely: the colour–magnitude relation; specific star formation rates; and the α enhancement of early-type galaxies. In our AGN model, black holes originate from Population III stars, in contrast to the merging scenario of previous works. In this paper, we show how the properties of present-day galaxies in cosmological chemo-hydrodynamical simulations change when we include our model for AGN feedback. Massive galaxies become redder, older, less massive, less compact, and show greater α enhancement than their counterparts without AGN. Since we reproduce the black hole mass and galaxy mass relation, smaller galaxies do not host a supermassive black hole and their star formation history is affected very little, but they can get external enrichment from nearby AGN depending on their environment. Nonetheless, the metallicity change is negligible, and the mass–metallicity relations, which are mainly generated by supernova feedback at the first starburst, are preserved.
KW - Abundances - galaxies
KW - Black hole physics - methods
KW - Evolution - galaxies
KW - Formation
KW - Numerical - galaxies
U2 - 10.1093/mnras/stv139
DO - 10.1093/mnras/stv139
M3 - Article
AN - SCOPUS:84925437044
SN - 0035-8711
VL - 448
SP - 1835
EP - 1846
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 2
ER -